PR is up; waiting for merge. I don't think it will merge this sprint since backports seem to take a while.
Checked on 4.5 cluster with payload 4.5.0-0.nightly-2020-10-22-144957. Node Overview page and Nodes list page are showing the same Filesystem Usage and Total value. The bug is fixed.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (OpenShift Container Platform 4.5.17 bug fix update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:4325